GTR Home > Conditions/Phenotypes > Frontotemporal dementia

Summary

Excerpted from the GeneReview: MAPT-Related Disorders
The clinical manifestations of MAPT-related disorders (MAPT-related tauopathies) are most typically those of frontotemporal dementia (FTDP-17), but also include progressive supranuclear palsy (PSP), corticobasal degeneration (CBD), mild late-onset parkinsonism, and dementia with epilepsy. Clinical presentation of frontotemporal dementia (FTD) is variable: some present with slowly progressive behavioral changes, language disturbances, and/or extrapyramidal signs, whereas others present with rigidity, bradykinesia, supranuclear palsy, and saccadic eye movement disorders. Onset is usually between ages 40 and 60 years, but may be earlier or later. The disease progresses over a few years into profound dementia with mutism. PSP is characterized by progressive vertical gaze palsy in combination with a prominent loss of balance at early stages of the disease. With progression, axial rigidity, dysarthria, and dysphagia become prominent, often in combination with a frontal dysexecutive syndrome. CBD is a progressive neurodegenerative disorder which affects both the frontoparietal cortex and the basal ganglia, resulting in a mild to moderate dementia in combination with asymmetric parkinsonism, ideomotor apraxia, aphasia, and an alien-hand syndrome.

Genes See tests for all associated and related genes

  • Also known as: DDPAC, FTDP-17, MAPTL, MSTD, MTBT1, MTBT2, PPND, PPP1R103, TAU, MAPT
    Summary: microtubule associated protein tau

  • Also known as: AD3, FAD, PS-1, PS1, S182, PSEN1
    Summary: presenilin 1

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